DRAM definition

DRAM (Dynamic Random Access Memory) is a kind of electronic volatile (temporary) data storage that's relatively fast and cheap, often used for the main system memory in computers. The "dynamic" refers to the charged state of the storage cells which is quickly lost without being "refreshed", as opposed to "static" which means the toggled states naturally remains for as long as there is power provided. Each bit cell typically consists of a capacitor (which works like a rechargeable battery) and a transistor, which "controls" the cell based on electrical inputs. This relative simplicity means that the DRAM chips can cheaply pack in more bit cells, at the cost of being slower and needing refresher circuitry and phases.